Adding-machine



W. 1. PASINSKI.

' ADDING MACHINE.

APPLICAHON F|LED1ULY2.i919.

1,342,459. Patented June 8, 1920.

UNITI-:D STATES .PATENT oFFICE.

l WALTER J'. rAsINsKI, on DETROIT, MICHIGAN, AssIGNoR To BURRoUGHsADDING MACHINE COMPANY, or DETROIT, MICHIGAN, A CORPORATION or MICHIGAN.

ADDING-MACHINE.

' Application led July 2,

, To all whom t may concern Be it known that I, 'WALTER J. PAsINsKI, acitizen of the United States, residing at Detroit, in the county ofIVayne and State of Michigan, have invented certain new and usefulImprovements in Adding-Machines, of which the following is aspecification.

The present invention relates to that type of adding or calculatingmachines known as key driven;7 inasmuch as the power for operating theadding mechanism is'derived from the striking of keys ,which ordinarilyare arranged in denominational rows, each row comprising nine keys.Reference may be had to prior Patents Nos. 1,156,600 and 1,282,425issued October 12, 1915 and Oc: tober 22, 1918, respectively, uponinventions of one Allen A. Horton.

The object of the present invention is to bring about lever actioncomparable to thatl of the key operated lever of said Patent No.1,282,425, using a lever of considerably less length asin theconstruction of Patent No. 1,156,600, whilelat the same time attaininguniformity in key depression.

In the drawings which accompany and form'part of this specification,Figure 1 represents a vertical longitudinal section of a machineembodying the present invention, with an elimination of detailsunnecessary to the understanding of said invention; Fig. 2 representscertain of the parts in action together with a diagrammaticrepresentation illustrating the character of the lever action; and Fig.3 is a detail horizoni ital cross-section on the line 3--3 of Fig. 1.

In view of the disclosures of the above mentioned patents and others,and the quite extensive commercial use of the machine of the type hereconcerned, it will be quite un* necessary to describe such machine inall its parts. Adding mechanism is illustrated at the leftl of Fig. 1and numeral 2 designates a gear segment which is in mesh with a gearpinion of the adding mechanism.

y There is pivotally coupled to this gear segment a rearwardly extendingbar 3 which at y its rear end is pivotally coupled to a lever or apivoted plate of triangular form, same being designated 4. Its lowerrear portion is mounted upon a fixed pivot at 5 and the stud whichconnects its upper end 'with said bar 3 is confined in an arc-shapedslot 6 'in one of the ydivision plates 7 ofthe frame-work. The forwardportion ofthis Specification of Letters Patent.

Patented June 8, 1920.

serial No. 308,320.

the construction of Patent No. 1,156,600, or

extending the lever rearward and there mounting it upon a fixed pivot asin the construction of Patent No. 1,282,425, the present inventionprovides for a novel controlv of the lever at the rear in shortened formwhich properly restricts its movement on'the floating fulcrum 8, andvprovides for uniform key action upon the lever. Thus the latter extendsrearwardand up ward beyond the part mounted on the float- .ing fulcrum,as shown at 11, and has an enlargement 12 of somewhat segmental form,which enlargement is made with a` curved slot 13. This slot is occupiedby a double flanged roller- 14, the flanges providingv for preservationof proper lateral relationship between the roller and the slottedenlargement of the lever. Fig. 3 shows the manner of mounting a seriesof these rollers, it being of course understood that the machine willhave a considerable number of levers 9. .The rollers are journaled upona rod 15 extending through Adivision plates 7, andsuitable spacingsleeves 16 and collars 17 will be employed to preserve the properlateral relationship' of parts. f .7

Springs 18 normally uphold the triangu-.-

lar plates or levers 4 and the levers 9, and correspondingly holdrearward the bars 3 and the gear segments 2. The keys 19 are mounted asusual and have shoulders overlying the upper edge of the lever 9, andsaid are normally held up by springs A20.

ke s i Fig. 2 illustrates the effect of depressingone of the keys andthe extreme extent of movement of parts is here illustrated, inasn muchas the numeral 'key 9 is theone depressed. The key operates directlyuponthe lever 9 forcing it downward and causing the .triangularE lever .4 toswing counter-clock.F wlse Vdriving the bar 3 forward and corre-`responds with that of a lever extending farther rearward as indicated bythe dotted lines, and fulcrumed at a point A corresponding with thefixed fulcrum of the lever F of Patent No. 1,282,425, but being in linewith the top edge of the lever.

It will be noted that the co-action between the guiding slot and theroller is unvarying in character, and as this o o-action controls thelever in its displacement by any one ot the keys, it is manifest 'that`the key action will be uniform.

Although there is this rearward prolongation of the lever, it is not'carried to anything like the extent of the prolongation required whenthe lever is to be mounted upon a tixed pivot at the rear; therefore theadvantages are vattained of reducing the over-all dimensions of themachine, lighteningits total weight, and etl'ecting saving of materials.

l claim 1. The combination with adding mechanism and a series of keys,of a lever operated upon by the latter; a pivotally mounted membersupplying a movable ulcrum `for said lever, the latter extendingrearward therefrom and having a guiding slot: and a frame fixture insaid slot; together with opy erating connections between the -lever andthe adding mechanism.

2. The combination with adding mechanism and a series ot keys, oft alever operated upon by the latter; a pivotally mounted member supplyinga movable tulcrum for said lever, the latter extending rearwardtherefrom and having a guiding slot.; and a frame fixture in said slot;together with operating connections between the said pivotally mountedmember and the adding mechanism, the forward .end of the lever beingfree.

3. The combination with adding mechanism including a gear segment, and aseries of depressible keys; of a bar coupled to said segment; apivotally mounted member to which the opposite end ot' said bar iscoupled a lever fulcrumed upon said member and extending along the keys,which are adapted to operate upon it,--the forward end of said leverbeing free and a prolongation rearward of its fulcruin having a curvedslot; and frame fixture having a roller occupying said slot.

VALTER J. PASINSK.

